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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/75E41D09-8F12-4AFE-8151-9EA7397E5DD0 | ||
| Year | 2015 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | M. Alshaaer, D. Zaharaki, K. Komnitsas, "Microstructural characteristics and adsorption potential of zeolitic tuff – metakaolin geopolymers," Desalin Water Treatment, vol. 56, no. 2, pp. 338-345, 2015. doi: 10.1080/19443994.2014.938306 https://doi.org/10.1080/19443994.2014.938306 | ||
| Appears in Collections |
The aim of this work is to investigate the microstructural characteristics and the adsorption potential of zeolitic tuff–metakaolin (ZM) geopolymers. For the identification of microstructure, X-ray diffraction (XRD) and scanning electron microscope (SEM) analyses were used. XRD showed that mordenite, a major zeolite mineral, disappeared upon geopolymerization, while SEM showed that ZM-geopolymers exhibit a uniform porous matrix consisting of nanoparticles (~40 nm). The adsorption efficiency of ZM-geopolymers was assessed using solutions containing 250 mg/L copper. The experimental results show that the maximum adsorption efficiency (7.8 mg Cu2+/g of adsorbent) is observed at an initial zeolitic tuff/metakaolin ratio of 0.5 which indicates that ZM-geopolymers can be used in environmental applications including the clean-up of industrial effluents and wastewaters.
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